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133 lines
3.8 KiB
133 lines
3.8 KiB
/* |
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* serial.h: Arch-dep definitions for the Etrax100 serial driver. |
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* |
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* Copyright (C) 1998-2007 Axis Communications AB |
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*/ |
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#ifndef _ETRAX_SERIAL_H |
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#define _ETRAX_SERIAL_H |
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#include <linux/circ_buf.h> |
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#include <asm/termios.h> |
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#include <asm/dma.h> |
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#include <arch/io_interface_mux.h> |
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/* Software state per channel */ |
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#ifdef __KERNEL__ |
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/* |
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* This is our internal structure for each serial port's state. |
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* |
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* Many fields are paralleled by the structure used by the serial_struct |
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* structure. |
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* |
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* For definitions of the flags field, see tty.h |
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*/ |
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#define SERIAL_RECV_DESCRIPTORS 8 |
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struct etrax_recv_buffer { |
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struct etrax_recv_buffer *next; |
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unsigned short length; |
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unsigned char error; |
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unsigned char pad; |
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unsigned char buffer[0]; |
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}; |
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struct e100_serial { |
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struct tty_port port; |
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int baud; |
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volatile u8 *ioport; /* R_SERIALx_CTRL */ |
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u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */ |
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/* Output registers */ |
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volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ |
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volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */ |
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volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */ |
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const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */ |
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/* Input registers */ |
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volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */ |
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volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */ |
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volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */ |
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volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */ |
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u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */ |
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u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */ |
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u8 iseteop; /* bit number for R_SET_EOP for the input dma */ |
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int enabled; /* Set to 1 if the port is enabled in HW config */ |
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u8 dma_out_enabled; /* Set to 1 if DMA should be used */ |
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u8 dma_in_enabled; /* Set to 1 if DMA should be used */ |
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/* end of fields defined in rs_table[] in .c-file */ |
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int dma_owner; |
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unsigned int dma_in_nbr; |
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unsigned int dma_out_nbr; |
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unsigned int dma_in_irq_nbr; |
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unsigned int dma_out_irq_nbr; |
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unsigned long dma_in_irq_flags; |
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unsigned long dma_out_irq_flags; |
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char *dma_in_irq_description; |
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char *dma_out_irq_description; |
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enum cris_io_interface io_if; |
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char *io_if_description; |
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u8 uses_dma_in; /* Set to 1 if DMA is used */ |
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u8 uses_dma_out; /* Set to 1 if DMA is used */ |
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u8 forced_eop; /* a fifo eop has been forced */ |
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int baud_base; /* For special baudrates */ |
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int custom_divisor; /* For special baudrates */ |
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struct etrax_dma_descr tr_descr; |
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struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS]; |
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int cur_rec_descr; |
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volatile int tr_running; /* 1 if output is running */ |
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int x_char; /* xon/xoff character */ |
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unsigned long event; |
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int line; |
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int type; /* PORT_ETRAX */ |
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struct circ_buf xmit; |
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struct etrax_recv_buffer *first_recv_buffer; |
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struct etrax_recv_buffer *last_recv_buffer; |
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unsigned int recv_cnt; |
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unsigned int max_recv_cnt; |
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struct work_struct work; |
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struct async_icount icount; /* error-statistics etc.*/ |
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struct ktermios normal_termios; |
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unsigned long char_time_usec; /* The time for 1 char, in usecs */ |
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unsigned long flush_time_usec; /* How often we should flush */ |
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unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */ |
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unsigned long last_tx_active; /* Last tx time in jiffies */ |
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unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */ |
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unsigned long last_rx_active; /* Last rx time in jiffies */ |
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int break_detected_cnt; |
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int errorcode; |
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#ifdef CONFIG_ETRAX_RS485 |
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struct serial_rs485 rs485; /* RS-485 support */ |
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#endif |
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}; |
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/* this PORT is not in the standard serial.h. it's not actually used for |
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* anything since we only have one type of async serial-port anyway in this |
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* system. |
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*/ |
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#define PORT_ETRAX 1 |
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/* |
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* Events are used to schedule things to happen at timer-interrupt |
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* time, instead of at rs interrupt time. |
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*/ |
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#define RS_EVENT_WRITE_WAKEUP 0 |
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#endif /* __KERNEL__ */ |
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#endif /* !_ETRAX_SERIAL_H */
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